Aryl–aryl coupling via palladium-catalyzed C–P/C–H bond cleavage
作者:Ziyuan Li、Haipin Zhou、Jinyi Xu、Xiaoming Wu、Hequan Yao
DOI:10.1016/j.tet.2013.02.001
日期:2013.4
The first example of aryl-aryl coupling through palladium-catalyzed C-P/C-H bond cleavage with good functional group tolerance is disclosed. This work demonstrates the phosphines could be used as coupling partners in palladium-catalyzed aryl-aryl coupling. (C) 2013 Elsevier Ltd. All rights reserved.
Access to Di- and Trisubstituted Oxazoles by NBS-Mediated Oxidative Cyclisation of<i>N</i>-Acyl Amino Acid Derivatives
A remarkably simple method for the synthesis of di- and trisubstituted functionalised oxazoles under metal- and catalyst-free conditions is described. An iterative bromination and debromination of N-acylated amino acid derivatives with NBS as the sole reagent cleanly led to various substituted oxazoles.